Dispensing closure for collapsible tubes



1932. F. F. B. CHAPMAN 1,843,707

DISPENSING CLOSURE FOR COLLAPSIBLE TUBES Filed Feb. 26} 1931 JiZwJZZW/ Patented Feb, 2, i932 F. B. GHAZMAN, @F NAfiH'UZ-l, NEW WPEEPJL DISPENSING CLUSURE FGR GQLLAPQIBLE applicattonfilcd February 2%, H3331. serial Ito. 5161126.

'lhis'invention is an improvement on the collapsible tube disclosed by my Patent No. 1,600,718, dated September 21, 1926, said tube being charged with plastic material such as 5, tooth paste, and provided with a rigid externally threaded mouth, and an internally threaded cap adapted to be screwed upon the mouth and close the bore thereof, a collapsible tube thus characterized being a well to known article of manufacture.

The patented tube is provided with a dispensing closure composed of said cap and an inner tube slidable in a smooth bore in the mouth. The cap is fixed to the outer end of in the inner tube and is provided with an internal thread engageable with an externalthread on the collapsible tube mouth. The inner tube has a dispensing orifice which is within the collapsible tube when the cap is so engaged with the mouth, and is withdrawn from the mouth when the cap is detached, so that collapsing pressure on the collapsible tube causes materal therein to exude through the dispensing orifice.

closure by providing improved means for securing-the cap to the inner tube Of the accompanying drawin s forming a to part of this specification,

Figure l is a fragmentary sectional view, much enlarged, showing a portion of a collapsible tube and my improved dispensing closure. 1

Figure 2 is a side view of the inner tube.

Figure 3 is a sectionon line 8-3 of Figure 2. I

The same reference characters indicate the same parts in all of the figures.

Figure l shows in section a portion of the breast 13, and the mouth 14 of an ordinary collapsible tube, "the mouth being provided with an external screw thread and with a smooth bore. 15 designates the cap, and 16 the inner tube,'the cap having an internal screw thread engageable with the neck thread, the cap and tube being connected with each other as hereinafter described, and the'tube being slidable in the neck bore and provided 59 with a dispensing orifice 17, which is exposed The object of the present invention is to improve the construction of said dispensing when the capis detached from the neck and drawn outward with the tube 16, to permit the dispensing of paste therethrough, as disclosed by my former patent. v v

The present invention resides wholly in the connection between the cap 15 and the outer end portion of the inner tube 16, as next described.

The cap is composed of moldablematerial,

preferably bakelite, althou h it may be of any other material adapts to be molded, such as block tin, or hard rubber. The outer end portion of the inner tube 16 is provided with anchoring means, with which the moldable material of the cap is engaged to lock the cap to the inner tube, the engagement being efiected by pressure on the ca material during the operation of forming t e cap, or after said cap has been formed.

Said anchoring means may be variously a embodied, and as here shown, is embodied in a roughened zone on the outer end portion of the inner tube, formed by knurling in such manner as to provide the external surface of the tube with alternating teeth or projections 19 and recesses 20.

The material of the cap is caused by pressure to conform closely to said projections and recesses, so that the cap and tube are securely interlocked by concealed fastening means. The projections 19 and recesses 20 are preferably inclined relative to the longitudinal axis of the tube, so that they are adapted to resist the separation of the cap from the tube by longitudinally directed force or pull The corrugated construction hereinbefore described is of conspicuous advantage over the pin loclr shown in my prior patent, in being easier and less expensive to assemble. In practice it costs barely one-third as much.

I claim:

1. A dispensing closure for a collapsible tube, having an externally screw-threaded smooth bored mouth, said closure comprising an inner tube slid-able in said mouth and having a dispensing orifice between its ends, and a cap oil moldable material molded on the outer end portion of the inner tube,and internally threaded to engage said external thread, the inner tube having concealed anchoring means on its outer end portion interengaged with the material of the cap to lock the cap to the inner tube.

2'. A dispensing closure for a, collapsible tube, having an externally screw-threaded smooth bored mouth, said closure comprising an inner tube slidable in said mouth and having a dis ensing orifice between its ends, and

a cap 0 moldable material molded on the outer end portion of the inner tube, and internelly threaded to engage said external thread, the inner tube having a concealed roughened zone on its outer end presenting alternating projections and recesses, and the material of the cap being interengaged with said projections and recesses and thereby locked to the inner tube. y

In testimony whereof l have refined my sig nature.

FRANK F. B. CHAPMAN,

ee- I 

